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Preparation method of mesoporous TiO2 supported nano-iron catalyst

A catalyst and nano-iron technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as poor degradation effect, and achieve the goal of improving ability, inhibiting recombination, and uniform grain refinement Effect

Active Publication Date: 2015-01-21
TIANJIN CHENGJIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can effectively solve the problem of releasing excessive iron ions into the water body when using nanometer alone and using TiO alone 2 The problem of poor degradation effect

Method used

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  • Preparation method of mesoporous TiO2 supported nano-iron catalyst

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preparation example Construction

[0034] Mesoporous TiO of the present invention 2 The preparation method of loaded nano-iron catalyst, the method comprises the following steps:

[0035] (1) Preparation of butyl titanate hydrolysis buffer

[0036] Add 2.13ml of concentrated hydrochloric acid with a mass fraction of 36% to 38% into a 250mL volumetric flask filled with anhydrous ethanol solvent to prepare a 0.1mol / L hydrochloric acid ethanol solution as a butyl titanate hydrolysis buffer;

[0037] (2) Mesoporous TiO 2 Catalyst preparation

[0038] The reactants required to prepare mesoporous TiO2 include, EO 20 PO 70 EO 20 (P123), butyl titanate, absolute ethanol, distilled water, butyl titanate buffer solution;

[0039] EO 20 PO 70 EO 20 (P123) as a surfactant, mesoporous TiO was prepared by hydrothermal synthesis 2 , the volume ratio of the reactants is: butyl titanate: absolute ethanol: absolute ethanol + distilled water: butyl titanate hydrolysis buffer solution=10:10:5+2.1:1-5; the operation steps...

Embodiment 1

[0054] Example 1 Mesoporous TiO 2 Preparation of supported nano-iron catalyst

[0055] Step 1: Adding 2g of surfactant to mesoporous TiO 2 Catalyst preparation

[0056] The present invention adopts hydrothermal synthesis method, and uses EO 20 PO 70 EO 20 (P123) is a surfactant, and butyl titanate is a titanium source. Put 2g of surfactant and 10ml of absolute ethanol in a beaker, stir at room temperature to fully dissolve the surfactant. Then slowly add 10ml of butyl titanate under stirring, continue to stir for 30min and mix well, record it as X component. Put 2.1ml of distilled water, 5ml of absolute ethanol and 2ml of custom buffer solution of too much acid into a pear-shaped separating funnel and mix thoroughly, and record it as Y component. Put component X on a magnetic stirrer, turn on the magnetic stirrer to stir vigorously, add component Y to component X dropwise, and keep stirring for 1 h. The above solution was transferred to a stainless steel hydrothermal r...

Embodiment 2

[0062] Example 2 Mesoporous TiO 2 Preparation of supported nano-iron catalyst

[0063] Step 1: Same as Step 1 in Example 1

[0064] Step 2: Mesoporous TiO with 30% nano-Fe loading 2 Preparation of supported nano-iron catalyst

[0065] At a temperature of 15°C-35°C, 2.4 g of mesoporous TiO 2 Catalyst and 100ml0.2mol / LFeSO 4 ·7H 2 O aqueous solution is placed in a three-necked flask, sealed, and recorded as component A; component A is placed on a magnetic stirrer, nitrogen protection is passed into the three-necked flask, and component A is ultrasonically dispersed for 10 minutes, and magnetic stirring is turned on to make the component A Part A and mix well.

[0066] Prepare 100ml0.4mol / L NaBH 4 solution, and adjust the pH to 9-10 with NaOH to make weakly alkaline NaBH 4 Solution, denoted as B component;

[0067] Add 50ml of absolute ethanol to the above component A, stir evenly, and then under the protection of nitrogen atmosphere, add the newly prepared component B dro...

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Abstract

The invention provides a preparation method of a mesoporous TiO2 supported nano-iron catalyst. The method comprises the following steps of preparing a butyl titanate hydrolysis buffer solution; preparing a mesoporous TiO2 catalyst; preparing the mesoporous TiO2 supported nano-iron catalyst, and finally, hermetically storing the obtained mesoporous TiO2 supported nano-iron catalyst under the condition of no oxygen. The preparation method provided by the invention has the effects that the fast hydrolysis-polycondensation reaction of the butyl titanate can be effectively delayed by using the method and the preparation process is simplified. The preparation method is advantageous for the growth of nano-iron particles in the pores of the mesoporous TiO2 catalyst and capable of effectively solving the accumulation and agglomeration problem of the nano-iron particles on the surface of the mesoporous TiO2 catalyst; as a result, the nano-iron crystalline grains are thinned and evened, the aggregation effect of the nano-iron particles is effectively relieved, the stability and inoxidizability of the nano-iron particles in air are improved, and the photocatalytic efficiency of the catalyst is improved; consequently, the utilization rate of sunlight is improved remarkably. Therefore, the high-concentration dye wastewater treating capability of the catalyst is effectively improved.

Description

technical field [0001] The invention relates to inorganic functional materials and fine chemical preparation technology, especially a kind of mesoporous TiO 2 Preparation method of loaded nano-iron catalyst. Background technique [0002] in TiO 2 Among photocatalytic materials, mesoporous TiO 2 The material has the characteristics of larger specific surface area and pore volume, better thermal stability and hydrothermal stability, well-developed and ordered pore structure, uniform and adjustable pore size, and easy surface modification. It is a more efficient photocatalyst. But mesoporous TiO 2 materials also exist TiO 2 Common problems of photocatalytic materials, such as wide band gap, narrow excitation wavelength range, low response to sunlight; mesoporous TiO 2 Compared with nano TiO 2 , its particle size is larger, which makes the mesoporous TiO 2 The quantum yield is relatively low, and the recombination rate of photogenerated carriers is high. How to maintain...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/745B01J37/34C02F1/30B82Y30/00
Inventor 费学宁姜远光武日雷董业硕
Owner TIANJIN CHENGJIAN UNIV
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